A time will however come (as I believe) when physiology will invade and destroy mathematical physics, as the latter has destroyed geometry.

Science is as yet in its infancy, and we can foretell little of the future save that the thing that has not been is the thing that shall be; that no beliefs, no values, no institutions are safe.

A discussion between Haldane and a friend began to take a predictable turn. The friend said with a sigh, 'It's no use going on. I know what you will say next, and I know what you will do next.' The distinguished scientist promptly sat down on the floor, turned two back somersaults, and returned to his seat. 'There,' he said with a smile. 'That's to prove that you're not always right.'

In fact, words are well adapted for description and the arousing of emotion, but for many kinds of precise thought other symbols are much better.

The extreme socialists desire to run every nation as a single business concern.

The advance of scientific knowledge does not seem to make either our universe or our inner life in it any less mysterious.

I have come to the conclusion that my subjective account of my motivation is largely mythical on almost all occasions. I don't know why I do things.